TRUE / FALSE

Question 11 Mark

$(4, 6, 8)$ is a Pythagorean triplet.

Answer

$(4,6,8)$ is a Pythagorean triplet. $($ False $)$
As $4^2+6^2 \neq 8^2$
$\Rightarrow 16+36 \neq 64$
$\Rightarrow 52 \neq 64$

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Question 21 Mark

There are $2n$ non$-$square numbers between the squares of consecutive numbers $n$ and $(n + 1).$

Answer

There are $2n$ non$-$square numbers between the squares of consecutive numbers $n$ and $(n + 1). ($True$)$

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Question 31 Mark

$1, 3, 6, 10, 15$, are called triangular numbers.

Answer

$1, 3, 6, 10, 15$, are called triangular numbers. $($True$)$

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Question 41 Mark

Square of an odd number is always an odd number.

Answer

Square of an odd number is always an odd number. $($True$)$

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Question 51 Mark

A number ending in an even number of zeros is always a perfect square.

Answer

A number ending in an even number of zeros is always a perfect square. $($False$)$
Correct : As $200, 500, 8000$, etc. are not perfect squares.

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Question 61 Mark

A number having $0, 1, 4, 5, 6$ or $9$ at its unit place is always a square number.

Answer

A number having $0, 1, 4, 5, 6$ or $9$ at its unit place is always a square number. $($False$)$
Correct : As $24, 14, 34, 26, 19, 50, 61, 35$, etc are not a perfect square

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Question 71 Mark

A number having $2,3,7$ or $8$ at its unit place is never a square number.

Answer

A number having $2, 3, 7$ or $8$ at its unit place is never a square number. $($True$)$

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Question 81 Mark

A perfect square can never be expressed as the product of pairs of equal prime factors.

Answer

A perfect square can never be expressed as the product of pairs of equal prime factors. $($True$)$

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Question 91 Mark

All natural numbers are not perfect squares.

Answer

All natural numbers are not perfect squares. $($True$)$

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MATHS TRUE / FALSE

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